Lithuanian! Im not sure if they were loaned from estonian :3 we used to have 10 (nominative, genitive, dative, accusative, instrumental, locative, illative, allative, adessive, and vocative) allative is basically dead outside of a few words like velniop, adessive is just dead (only really seen in old writings) but illative is the interesting one: it’s not used in standard lithuanian outside of some set phrases (kairėn, dešinėn, and in our anthem vardan), but it’s still used in dzūkija and east aukštaitija, so… Yeah that’s some lore :3